<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            background: #050505;
        }
        .cube {
            position: relative;
            width: 300px;
            height: 300px;
            transform-style: preserve-3d;
            transform: rotateX(-30deg);
            animation: animate 4s linear infinite;
           
        }
        @keyframes animate {
            0%
            {
                transform: rotateX(-30deg) rotateY(0deg);
            }
            100%
            {
                transform: rotateX(-30deg) rotateY(360deg);
            }
        }
        .cube div {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            transform-style: preserve-3d;
        }
        .cube div span {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:linear-gradient(#151515,#00ec00) ;
            transform: rotateY(calc(90deg * var(--i))) translateZ(150px);
        }
        .top {
            position: absolute;
            top: 0;
            left: 0;
            width: 300px;
            height: 300px;
            background: #222;
            transform: rotateX(90deg) translateZ(150px);
        }
        .top::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 300px;
            height: 300px;
            background: #0f0;
            transform: translateZ(-380px);
            filter: blur(20px);
            box-shadow: 0 0 120px rgba(0,255,0,0.2),
            0 0 200px rgba(0,255,0,0.4),
            0 0 300px rgba(0,255,0,0.6),
            0 0 400px rgba(0,255,0,0.8),
            0 0 500px rgba(0,255,0,1);
        }
    </style>
</head>
<body>
   <div class="cube">
    <div class="top"></div>
    <div>
        <span style="--i:0;"></span>
        <span style="--i:1;"></span>
        <span style="--i:2;"></span>
        <span style="--i:3;"></span>
    </div>
   </div>
</body>
</html>